CN112351263B - Projector focusing method and system - Google Patents
Projector focusing method and system Download PDFInfo
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- CN112351263B CN112351263B CN202011014845.8A CN202011014845A CN112351263B CN 112351263 B CN112351263 B CN 112351263B CN 202011014845 A CN202011014845 A CN 202011014845A CN 112351263 B CN112351263 B CN 112351263B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/12—Picture reproducers
- H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
- H04N9/3141—Constructional details thereof
- H04N9/317—Convergence or focusing systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/60—Control of cameras or camera modules
- H04N23/67—Focus control based on electronic image sensor signals
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/12—Picture reproducers
- H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
- H04N9/3141—Constructional details thereof
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Abstract
The application relates to a projector focusing method and a system, wherein the projector focusing method comprises the following steps: acquiring the volume of a loudspeaker of a projector; detecting the angle variation of an attitude sensor on the projector under the condition that the volume of the loudspeaker exceeds a preset volume threshold; under the condition that the angle variation is smaller than the first preset angle threshold and larger than the second preset angle threshold, the gyroscope senses signals due to the fact that the sound is too large, the automatic focusing signals cannot be achieved, the problem that when the sound emitted by the loudspeaker is large in the using process of the projector, the generated micro vibration is detected by the gyroscope sensor is solved, the projector misjudges the position of the projector and changes, the problem that the projector continuously repeats automatic focusing is caused, the performance stability of the projector is improved, and the use experience of a user is improved.
Description
Technical Field
The present application relates to the field of display technologies, and in particular, to a projector focusing method and system.
Background
With the rapid development of display technology, projectors are widely applied in life, the intelligent degree of the projectors is improved accordingly, and in actual use, after the position of the projector changes, the projector can automatically refocus again, so that the picture projected on a curtain or a wall surface by the projector is clear and complete.
In the correlation technique, the sensing sensitivity of gyroscope inductor is higher among the projecting apparatus, and when the sound that sends was broadcast to the inside speaker of projecting apparatus was great, the projecting apparatus body can produce certain microvibration owing to the acoustic shock, and this microvibration also can be detected by the gyroscope inductor for the projecting apparatus misjudges the position of self and changes, thereby leads to the projecting apparatus to focus again.
At present, no effective scheme is provided aiming at the problem that in the related technology, when a projector is used, the sound is too loud, so that the automatic focusing is continuously repeated.
Disclosure of Invention
The embodiment of the application provides a projector focusing method and system, which are used for at least solving the problem that the projector in the related art has overlarge sound when in use, so that the automatic focusing is continuously repeated.
In a first aspect, an embodiment of the present application provides a projector focusing method, where the method includes: acquiring the angle variation of an attitude sensor on a projector; acquiring the volume of a loudspeaker of the projector under the condition that the angle variation is larger than a first preset angle; and under the condition that the volume of the loudspeaker is greater than or equal to a preset volume threshold value, the projector does not automatically focus.
In some of these embodiments, the method comprises: and under the condition that the volume of the loudspeaker is smaller than the preset volume threshold value, the projector automatically focuses.
In some of these embodiments, the method comprises: and under the condition that the volume of the loudspeaker is greater than the preset volume threshold and the angle variation is greater than a second preset angle threshold, automatically focusing the projector, wherein the second preset angle threshold is greater than the first preset angle threshold.
In a second aspect, an embodiment of the present application provides a projector focusing method, where the method includes: acquiring the angle variation of an attitude sensor on the projector; acquiring the working state of the sound card drive under the condition that the angle variation is larger than the first preset angle; and under the condition that the sound card drive is not in a working state, the projector automatically focuses.
In some of these embodiments, the method comprises: under the condition that the sound card drive is in a working state, acquiring the volume of the loudspeaker; the projector automatically focuses when the volume of the loudspeaker is smaller than the preset volume threshold; and under the condition that the volume of the loudspeaker is greater than or equal to a preset volume threshold value, the projector does not automatically focus.
In some of these embodiments, the method comprises: after the loudspeaker volume is obtained, the projector automatically focuses under the condition that the loudspeaker volume is larger than or equal to a preset volume threshold value and the angle variation is larger than a second preset angle.
In a third aspect, an embodiment of the present application provides a projector focusing system, including: the device comprises an attitude sensor, a processor, a loudspeaker and a lens driving device; the processor acquires attitude sensor's angle variation the angle variation is greater than under the first condition of predetermineeing the angle, the processor acquires the speaker volume of speaker the speaker volume is greater than or equal to under the condition of predetermineeing the volume threshold value, the processor instruction is not to the camera lens drive arrangement sends the auto focus signal.
In some of these embodiments, the method comprises: after the processor acquires the volume of the loudspeaker, the processor instructs the lens driving device to send out an automatic focusing signal under the condition that the volume of the loudspeaker is smaller than the preset volume threshold.
In some of these embodiments, the method comprises: after the processor acquires the volume of the loudspeaker, the processor instructs the lens driving device to send a focusing signal under the condition that the volume of the loudspeaker is larger than the preset volume threshold and the angle variation is larger than a second preset angle threshold.
In a fourth aspect, an embodiment of the present application provides a projector focusing system, including: the device comprises an attitude sensor, a processor, a sound card driver, a loudspeaker and a lens driver; the processor acquires the angle variation of the attitude sensor, the processor acquires the working state of the sound card drive under the condition that the angle variation is larger than a first preset angle, and the processor indicates that the lens driving device sends out a focusing signal under the condition that the sound card drive is not in the working state.
In some of these embodiments, the method comprises: the processor acquires the loudspeaker volume of the loudspeaker under the condition that the sound card drive is in the working state, and instructs the lens driving device to send out an automatic focusing signal under the condition that the loudspeaker volume is smaller than the preset volume threshold; and under the condition that the volume of the loudspeaker is greater than or equal to the preset volume threshold value, the processor does not instruct the lens driving device to send out an automatic focusing signal.
In some of these embodiments, the method comprises: the sound card drive is in under operating condition's the condition, the treater acquires the speaker volume of speaker the speaker volume is greater than or equal to preset volume threshold value just under the condition that the angle variation is greater than the second and predetermines the angle, the treater instruction is right lens drive arrangement sends the auto focus signal.
Compared with the related art, the projector focusing method provided by the embodiment of the application detects the angle variation of the attitude sensor on the projector by acquiring the loudspeaker volume of the projector and under the condition that the loudspeaker volume exceeds the preset volume threshold; under the condition that this angle variation is less than first predetermined angle threshold value and is greater than the second predetermined angle threshold value, judge that sound is too big and lead to the gyroscope to sense the signal, do not reach the auto focus signal down, sound is too big when having solved the projecting apparatus and using, leads to constantly repeated auto focus's problem for the interference killing feature reinforcing of projecting apparatus has promoted the stability in use of projecting apparatus.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
FIG. 1 is a block diagram of a projector focusing system according to an embodiment of the present application;
FIG. 2 is a flow chart of a projector focusing method based on an attitude sensor and a speaker according to an embodiment of the application;
FIG. 3 is a flowchart of a focusing method based on the volume of the attitude sensor and the speaker being greater than a preset volume threshold and the user moving according to an embodiment of the application;
FIG. 4 is a block diagram of a projector focusing system according to another embodiment of the present application;
FIG. 5 is a flowchart of a projector focusing method not in operation based on sound card driving according to an embodiment of the present application;
fig. 6 is a flowchart of a projector focusing method in an operating state based on a sound card drive according to an embodiment of the present application;
fig. 7 is a flowchart of focusing by a lens driving device of an auto-focusing method of a projector according to an embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be described and illustrated below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments provided in the present application without any inventive step are within the scope of protection of the present application.
It is obvious that the drawings in the following description are only examples or embodiments of the present application, and that it is also possible for a person skilled in the art to apply the present application to other similar contexts on the basis of these drawings without inventive effort. Moreover, it should be appreciated that such a development effort might be complex and tedious, but would nevertheless be a routine undertaking of design, fabrication, and manufacture for those of ordinary skill having the benefit of this disclosure, given the benefit of this disclosure, without departing from the scope of this disclosure.
Reference in the specification to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the specification. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of ordinary skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments without conflict.
Unless defined otherwise, technical or scientific terms referred to herein shall have the ordinary meaning as understood by those of ordinary skill in the art to which this application belongs. Reference to "a," "an," "the," and similar words throughout this application are not to be construed as limiting in number, and may refer to the singular or the plural. The use of the terms "including," "comprising," "having," and any variations thereof herein, is meant to cover a non-exclusive inclusion; for example, a process, method, system, article, or apparatus that comprises a list of steps or modules (elements) is not limited to the listed steps or elements, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus. Reference to "connected," "coupled," and the like in this application is not intended to be limited to physical or mechanical connections, but rather can include electrical connections, whether direct or indirect. The term "plurality" as referred to herein means two or more. "and/or" describes an association relationship of associated objects, meaning that three relationships may exist, for example, "A and/or B" may mean: a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship. Reference herein to the terms "first," "second," "third," and the like, are merely to distinguish similar objects and do not denote a particular ordering for the objects.
The embodiment provides a projector focusing system, fig. 1 is a block diagram of a projector focusing system according to an embodiment of the present application, and as shown in fig. 1, the system includes a processor 10, a speaker 11, a sound sensor 12, an attitude sensor 13, and a lens driving device 15, where the sound sensor 12, the attitude sensor 13, and the lens driving device 15 communicate with the processor 10 through signal lines, the processor 10 receives status information of the projector and processes the status information, and when it is determined that a user behavior causes an angle change of the attitude sensor to be greater than a first preset angle, a focusing signal is sent to the lens driving device 15, and the lens driving device 15 performs automatic focusing after receiving the focusing signal from the processor 10.
The present embodiment provides a projector focusing method, fig. 2 is a flowchart of a projector focusing method based on a posture sensor 13 and a speaker 11 according to an embodiment of the present application, and as shown in fig. 2, the flowchart includes the following steps:
s201, obtaining an angle variation of an attitude sensor 13 on the projector, where the attitude sensor 13 may be a gyroscope sensor, the gyroscope sensor is triggered when sensing external vibration, and after being triggered, an angle of the gyroscope sensor changes, and in general, the larger the external vibration is, the larger the angle variation of the gyroscope is;
s202, determining whether the obtained angle variation is greater than a first preset angle, and obtaining the volume of the speaker 11 of the projector when the angle variation is greater than the first preset angle, where it should be noted that the projector does not perform auto-focusing when the angle variation is less than or equal to the first preset angle, where the first preset angle is a critical angle variation of the attitude sensor 13 that triggers the projector to perform auto-focusing;
s203, judging the volume of the acquired loudspeaker 11, and if the volume of the loudspeaker 11 is larger than or equal to a preset volume threshold value, the processor 10 determines that the angle variation exceeds a first preset angle threshold due to the excessive sound, the projector does not automatically focus, in case the volume of the speaker 11 is smaller than the preset volume threshold, the processor 10 determines that the user action causes the angle change amount to exceed the first preset angle threshold, the projector automatically focuses, wherein the volume threshold is a critical value of automatic focusing triggered by sound vibration measured by controlling the volume of a loudspeaker when the projector leaves a factory, when the volume of the projector is greater than the threshold, the projector will trigger the auto-focusing with a high probability, and it should be noted that, because the acoustic shock is affected by the internal structure precision and installation error of the projectors, the volume threshold of each projector needs to be tested independently and is generally different;
through the steps S201 to S203, compared with the prior art in which whether to perform auto-focusing is determined only according to the state of the attitude sensor 13, the technology comprehensively judges whether the cause of focusing is loud sound or user behavior according to the volume of the speaker 11 and the angle variation of the attitude sensor 13, and under the condition that the angle variation of the attitude sensor 13 is larger than the first preset angle due to the loud volume of the speaker 11, the projector does not perform auto-focusing, thereby solving the problem that the auto-focusing is repeated continuously due to the loud sound in the use process of the projector, enhancing the anti-interference capability of the projector, and improving the use stability of the projector.
In some embodiments, fig. 3 is a flowchart of a focusing method based on the volume of the attitude sensor 13 and the speaker 11 being greater than a preset volume threshold and the user moving, as shown in fig. 3, where the method includes the following steps:
s301, when the volume of the speaker 11 is greater than the preset volume threshold and the angle variation is greater than a second preset angle threshold, the processor 10 determines that the sound is too loud and the angle variation is greater than the first preset angle, and the projector automatically focuses, wherein the second preset angle threshold is greater than the first preset angle threshold, for example, when the current volume of the projector is 80db and greater than 75db, the angle variation of the attitude sensor 13 is continuously obtained as 45 °, the angle variation of the attitude sensor 45 ° is greater than 43 °, and the projector automatically focuses, where it should be noted that the second preset angle is obtained by continuously increasing the volume of the projector when the projector is shipped from the factory, and when the volume of the projector is so great as to cause the projector to automatically focus, the angle variation of the attitude sensor 13 at this time is read, optionally, the second preset angle threshold may be influenced by internal structures, and each projector needs to be tested separately and is generally different;
through the step S301, compared with the prior art in which whether the projector performs automatic focusing is determined only according to the state of the attitude sensor 13, the technology comprehensively judges whether the cause of focusing is loud sound or user behavior according to the volume of the speaker 11 and the angle variation of the attitude sensor 13, thereby solving the problem that the volume cannot be automatically focused when the volume of the projector is large and exceeds a threshold value, further improving the anti-interference capability of the projector, improving the stability of the projector, and being optional.
Fig. 4 is a block diagram of a projector focusing system according to another embodiment of the present application, and as shown in fig. 4, the system includes a processor 10, a speaker 11, a sound sensor 12, an attitude sensor 13, a sound card driver 14, and a lens driver 15, where the sound sensor 12, the attitude sensor 13, the sound card driver 14, and the lens driver 15 communicate with the processor 10 through signal lines, the processor 10 receives status information of the projector and processes the status information, and when it is determined that a user action causes an angle change of the attitude sensor 13 to be greater than a first preset angle, a focusing signal is sent to the lens driver 15, and the lens driver 15 performs auto-focusing after receiving the focusing signal from the processor 10.
The present embodiment provides a projector focusing method, fig. 5 is a flowchart of a projector focusing method based on the sound card driver 14 not being in a working state according to an embodiment of the present application, and as shown in fig. 5, the flowchart includes the following steps:
s501, acquiring the angle variation of the attitude sensor 13 on the projector;
s502, whether the obtained angle variation is greater than a first preset angle, and if the angle variation is greater than the first preset angle, obtaining a working state of the sound card driver 14;
s503, if the acquired state information of the sound card driver 14 is not in the working state, the processor 10 determines that the angle variation of the attitude sensor 13 is greater than a first preset angle due to the user behavior, and the projector performs auto-focusing;
through the steps S501 to S503, compared with the prior art in which whether the projector performs automatic focusing is determined only according to the state of the attitude sensor 13, the technology comprehensively determines whether the cause of focusing is loud sound or user behavior according to the working state of the sound card driver 14 and the angle variation of the attitude sensor 13, under the condition that the angle variation of the attitude sensor 13 is larger than a first preset angle due to the loud volume of the speaker 11, the projector does not perform automatic focusing, the problem of continuous repeated automatic focusing caused by loud sound in the using process of the projector is solved, the anti-interference capability of the projector is enhanced, and the use stability of the projector is improved
In some embodiments, fig. 6 is a flowchart of a projector focusing method based on the sound card driver 14 in an operating state according to an embodiment of the present application, and as shown in fig. 6, the flowchart includes the following steps:
s601, when the obtained status information of the sound card driver 14 is in a working status, obtaining a volume of a speaker 11 of the projector, when the volume of the speaker 11 is greater than or equal to a preset volume threshold, the processor 10 determines that an angle variation of the attitude sensor 13 is greater than a first preset angle due to an excessive sound, and the projector does not perform auto-focusing, and when the volume of the speaker 11 is less than the preset volume threshold, the processor 10 determines that an angle variation of the attitude sensor 13 is greater than the first preset angle due to a user action, and the projector performs auto-focusing;
s602, when the volume of the speaker 11 is greater than the volume threshold and the angle variation of the attitude sensor 13 is greater than a second preset angle, the processor 10 determines that the sound is too loud and the angle variation of the attitude sensor 13 is greater than the first preset angle while the user moves the projector, and the projector performs auto-focusing;
through the steps S601 to S602, compared with the prior art in which whether the projector performs automatic focusing is determined only according to the state of the attitude sensor 13, the technology comprehensively determines that the cause of focusing is loud sound or user behavior according to the volume of the speaker 11 and the angle variation of the attitude sensor 13, thereby solving the problem that when the volume of the projector is loud and exceeds the volume threshold, the projector is moved by a user at the same time and cannot perform automatic focusing, further improving the anti-interference capability of the projector, improving the use stability of the projector, and optionally, when the volume of the projector exceeds the volume threshold, the user can also manually send a signal to prompt the projector to complete focusing.
In some embodiments, fig. 7 is a flowchart of focusing by the lens driving device 15 of the automatic focusing method of the projector according to the embodiment of the present application, and as shown in fig. 7, the flowchart includes the following steps:
s701, the lens driving device 15 receives a focusing signal sent by the processor 10;
s702, the lens driving device 15 drives the lens to move forwards or backwards and take a picture;
s703, shooting a clear image by a lens;
s704, completing automatic focusing of the projector;
it should be noted that, in general, the lens needs to be continuously photographed in the process of moving forward or moving backward, and the most suitable position is determined according to the photographed picture, and the most suitable position is the focusing point.
Those skilled in the art will appreciate that the block diagrams are merely partial structures related to the embodiments of the present application and do not constitute limitations on the systems to which the embodiments of the present application may be applied, and that a particular system may include more or less components than those shown, or may combine certain components, or have a different arrangement of components.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by hardware instructions of a computer program, which can be stored in a non-volatile computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. Any reference to memory, storage, database, or other medium used in the embodiments provided herein may include non-volatile and/or volatile memory, among others. Non-volatile memory can include read-only memory (ROM), Programmable ROM (PROM), Electrically Programmable ROM (EPROM), Electrically Erasable Programmable ROM (EEPROM), or flash memory. Volatile memory can include Random Access Memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in a variety of forms such as Static RAM (SRAM), Dynamic RAM (DRAM), Synchronous DRAM (SDRAM), Double Data Rate SDRAM (DDRSDRAM), Enhanced SDRAM (ESDRAM), Synchronous Link DRAM (SLDRAM), Rambus Direct RAM (RDRAM), direct bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM).
It should be understood by those skilled in the art that various technical features of the above embodiments can be combined arbitrarily, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, however, as long as there is no contradiction between the combinations of the technical features, the scope of the present description should be considered as being described in the present specification.
The above embodiments only express several implementation modes of the present application, and the description is specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, and these are all within the scope of protection of the present application. Therefore, the protection scope of the present patent application shall be subject to the appended claims.
Claims (9)
1. A method of focusing a projector, the method comprising:
acquiring the angle variation of an attitude sensor on a projector;
acquiring the volume of a loudspeaker of the projector under the condition that the angle variation is larger than a first preset angle, wherein the first preset angle is the critical angle variation of an attitude sensor triggering the automatic focusing of the projector;
and when the volume of the loudspeaker is greater than or equal to a preset volume threshold value, the projector does not automatically focus, wherein the preset volume threshold value is a critical value for triggering the projector to automatically focus through the sound shock detected by controlling the volume change of the loudspeaker.
2. The method according to claim 1, characterized in that it comprises:
and under the condition that the volume of the loudspeaker is smaller than the preset volume threshold value, the projector automatically focuses.
3. A projector focusing method, the method comprising:
acquiring the angle variation of an attitude sensor on a projector;
acquiring the volume of a loudspeaker of the projector under the condition that the angle variation is larger than a first preset angle, wherein the first preset angle is the critical angle variation of an attitude sensor for triggering the projector to automatically focus;
and under the condition that the volume of the loudspeaker is greater than or equal to a preset volume threshold value, judging whether the angle variation is greater than a second preset angle, if so, indicating the projector to automatically focus, otherwise, indicating the projector not to automatically focus, wherein the second preset angle is greater than the first preset angle.
4. A projector focusing method, the method comprising:
acquiring the angle variation of an attitude sensor on the projector;
acquiring a working state of a sound card drive under the condition that the angle variation is larger than a first preset angle, wherein the first preset angle is the critical angle variation of an attitude sensor triggering the automatic focusing of the projector;
under the condition that the sound card drive is not in a working state, the projector automatically focuses;
acquiring the volume of a loudspeaker under the condition that the sound card drive is in a working state;
when the volume of the loudspeaker is smaller than a preset volume threshold value, the projector automatically focuses;
and under the condition that the volume of the loudspeaker is greater than or equal to a preset volume threshold value, the projector does not perform automatic focusing, wherein the preset volume threshold value is a critical value for triggering the automatic focusing of the projector through sound shock measured by controlling the volume change of the loudspeaker.
5. The method of claim 4, wherein after the speaker volume is obtained, the projector automatically focuses when the speaker volume is greater than or equal to a preset volume threshold and the angle variation is greater than a second preset angle.
6. A projector focusing system, the system comprising: the device comprises an attitude sensor, a processor, a loudspeaker and a lens driving device;
the processor acquires attitude sensor's angle variation the angle variation is greater than under the first condition of predetermineeing the angle, the processor acquires the speaker volume of speaker under the speaker volume is greater than or equal to predetermines under the condition of volume threshold, the processor instructs not to send the auto focus signal to camera lens drive arrangement, wherein, first predetermined angle is the trigger the critical angle variation of projector auto focus's attitude sensor, predetermine the volume threshold and trigger through the sound vibrations that control speaker volume change was surveyed the critical value of projector auto focus.
7. The system of claim 6, wherein the processor instructs the lens driving device to issue an autofocus signal if the speaker volume is less than the preset volume threshold after the speaker volume is obtained.
8. A projector focusing system, the system comprising: the device comprises an attitude sensor, a processor, a loudspeaker and a lens driving device;
the method comprises the steps that the processor obtains angle variation of an attitude sensor on the projector, and under the condition that the angle variation is larger than a first preset angle, the processor obtains the loudspeaker volume of the projector, wherein the first preset angle is critical angle variation of the attitude sensor triggering the projector to automatically focus;
the processor judges whether the angle variation is larger than a second preset angle or not under the condition that the volume of the loudspeaker is larger than or equal to a preset volume threshold value, if so, the processor indicates that the lens driving device sends an automatic focusing signal, and if not, the processor indicates that the lens driving device does not send the automatic focusing signal, wherein the second preset angle is larger than the first preset angle.
9. A projector focusing system, the system comprising: the device comprises an attitude sensor, a processor, a sound card driver, a loudspeaker and a lens driver;
the processor acquires the angle variation of the attitude sensor, acquires the working state of the sound card drive when the angle variation is larger than a first preset angle, and instructs the lens drive device to send a focusing signal when the sound card drive is not in the working state, wherein the first preset angle is the critical angle variation of the attitude sensor triggering the projector to automatically focus;
acquiring the volume of a loudspeaker under the condition that the sound card drive is in a working state;
when the volume of the loudspeaker is smaller than a preset volume threshold value, the processor instructs to send out a focusing signal to the lens driving device;
and under the condition that the volume of the loudspeaker is greater than or equal to a preset volume threshold value, the processor indicates that a focusing signal is not sent to the lens driving device, wherein the preset volume threshold value is a critical value for triggering the projector to automatically focus through sound vibration measured by controlling the volume change of the loudspeaker.
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